Home / 39,159.60-58,739.40-12,865.20

Finding the Fourth Proportional to 39,159.60, 58,739.40 and 12,865.20

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Solution

The fourth proportional to 39,159.60, 58,739.40 and 12,865.20 is: 19,297.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,159.60 : 58,739.40 = 12,865.20 : x
  2. Step 2: Convert to fraction form
    39,159.60/58,739.40 = 12,865.20/x
  3. Step 3: Cross multiply
    39,159.60x = 58,739.40 × 12,865.20
  4. Step 4: Simplify right side
    39,159.60x = 755,694,128.88
  5. Step 5: Solve for x
    x = 755,694,128.88/39,159.60
  6. Step 6: Final answer
    x = 19,297.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.